Biology 9 Lesson 27: Practice: Regular Observation
1. Theoretical Summary
Review the knowledge of the concept of regularity, and recognize and distinguish between variables and mutations.
2. Practice Procedure
a. Observation and common awareness
b. Prove that a mutation is a non-heritable variation
– Observed the difference between 3 plants of nipa palm grown in 3 different places and each tree was not the same as the original tree that was grown in another environment.
Thus, a variable usually has the following characteristics:
- Alter the phenotype of the same genotype.
- Not inherited.
- Expressed simultaneously in a defined direction corresponding to environmental conditions.
- Variables are often beneficial to help organisms better adapt to environmental conditions.
c. Identify the influence of the environment on quantitative and qualitative traits
– Observe the size of kohlrabi plants in good and poor care conditions.
– Care conditions have a great influence on quantitative traits.
– Observation of kohlrabi tuber shape under 2 conditions of care. Despite being cared for with different conditions, in general the shape of kohlrabi tubers does not change. Thus, it can be concluded that the quality trait is not affected by the environment.
3. Report results
The groups take turns to evaluate the performance report
First and last name ………….
After completing this lesson, you should:
- Identify common variables that arise in practice.
- Distinguish between qualitative traits and quantitative traits from which to know how the environment affects a certain trait.